Whiffletree-hook.



0. W. BLACKBURN.

WHIFPLETREE HOOK. APPLICATION. FILED 001:. 20. 1906.

Witume attoutu u:

s cm, WASHINGTON, a.

PATENTED JULY 16, 1907.

' xw, jfmw' -mq CHARLES W. BLACKBURN, OF BISBEE, ARIZONA TERRITORY.

-WHIFFLETREE-HOOK.

Specification of Letters Patent.

Patented July 16, 1907.

Application filed October 20,1906. Serial No- 339,820.

To all whom it may concern:

Be it known that 1, CHARLES W. BLACKBURN, a citizen of the UnitedStates, residing at Bisbee, in the county of Cochise and Territory ofArizona, have invented new and useful Improvements in Whiffietree-Hooks, of which the following is a specification.

This invention is a whifi'letree hook, and has for its object to providemeans for looking or closing the hook to prevent accidentaldisengagement of the traces.

A further object is to provide a hook constructed so that the traces canbe readily attached or detached.

In the accompanying drawing, Figure l is a plan view of the invention.Fig. 2 is a rear elevation. Fig. 3 is a section on the line 33 ofFig. 1. Fig. 4 is a similar section showing the parts in anotherposition. Fig. 5

is a section on the line 55 of Fig. 4.

Referring specifically to the drawing, 10 denotes one of the ends of anordinary whifiietree into which is screwed a stem 11 provided withthreads 12 for that purpose. The stem projects from the end of thewhiffletree, and on said projecting end is rotatably and slidablymounted a sleeve 13 having a forwardly extending hook 14, said hookbeingformed integral with the sleeve. The projecting end of the stem iswithout threads and at its extremity is a key or feather 15 adapted toenter a key-way l6 in'the bore of the sleeve. The'key-way has a shoulder17 formed therein which, when engaged by the inner end of the feather asshown in Fig. 5 acts as a stop and prevents the sleeve from being'pulledoff the stem. The outer end of the sleeve has a notch 18 whichextends-from the bore of the sleeve and receives the inner end of theleather. The notch limits the swing of the sleeve on the stem byengagement of the feather with its opposite ends.

The hook is locked by sliding the sleeve 13 inwardly onthe stem 11 untilthe outer end of the latter touches the end of the hook as shown in Fig.1 thus forming I a closure for the hook. This brings the feather 15outside the sleeve with the exception of that portion which extends intothe notch 18. The hook is now turned to throw the feather out ofalinement with the key-way 16 whereby the sleeve is locked againstlongitudinal movement on the stem.

Toremove the traces the hook is swung upwardly as shown in Fig. 4 tobring the feather in line with the key-way, after which the sleeve canbe pulled outwardly 'on the stem as shown in Fig. 5 which withdraws theend of the stem from the end of the hook and opens the latter to permitremoval of the traces. The shoulder 17 as already stated acts as a stopto prevent the sleeve from being pulled off the stem. Fig. 5 also showstheposition of the hook when the traces are placed therein, after whichthe hook is locked as already described.

I claim:

The combination with a whiflietree, of a stem extending from one endthereof, and provided at its outer end with a feather, a rotatablesleeve on the stem having a'key-way to receive the feather and slidablebehind the feather between the inner end thereof and the outer end ofthe whifiietree, said sleeve having a stop-notch in its outer end toreceive a portion of the key for limiting the rotation of the sleeve,and a stop in the key-way engageable by the rear end of the feather tolimit the forward sliding move ment of the sleeve.

specification in the presence of two subsci'ibing witnesses.

CHARLES W. BLACKBURN. Witnesses:

JoHN W. Ross, SAMUEL Bownns.

In testimony whereof I have signed my name to this

